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09/29/2003: "Loran results with LPF installed"

Over the weekend, I built a low pass filter for the Loran receiver. Details are at http://www.febo.com/geekworks/antennas/amrad-lpf.html.

It seems to have solved the dirurnal phase jump problem once and for all, and although I only have about 12 hours of data so far to go on, it looks like the trace is generally cleaner now -- which makes sense since I've now removed the 30dB attenuator that I had in place before. The net result is that the interfering signal is much reduced, but the desired signal is 30dB stronger than it was.